Pentest Tools Fuzzdb

Published on January 19th, 2016 📆 | 5608 Views ⚑


FuzzDB — Open Source Database Fuzzing

FuzzDB is the most comprehensive Open Source database of malicious inputs, predictable resource names, greppable strings for server response messages, and other resources like web shells. It’s like an application security scanner, without the scanner.


What’s in FuzzDB?

  • Attack Patterns – Categorized by platform, language, and attack type, malicious and malformed inputs known to cause information leakage and exploitation have been collected into sets of test cases. FuzzDB contains comprehensive lists of attack payloads known to cause issues like OS command injection, directory listings, directory traversals, source exposure, file upload bypass, authentication bypass, http header crlf injections, and more. (
  • Response Analysis – Since system responses also contain predictable strings, FuzzDB contains a set of regex pattern dictionaries such as interesting error messages to aid detection software security defects, lists of common Session ID cookie names, and more. (


Why was FuzzDB created?

The sets of payloads currently built in to open source fuzzing and scanning software are poorly representative of the total body of potential attack patterns. Commercial scanners are a bit better, but not much. However, commercial tools also have a downside, in that that they tend to lock these patterns away in obfuscated binaries.

Furthermore, it’s impossible for a human pentester to encounter and memorize all permutations of the meta characters and hex encoding likely to cause error conditions to arise.

FuzzDB was created to aggregate all known attack payloads and common predictable resource names into usable fuzzer payload lists, categorized by function and platform, and make them freely available under an Open Source license. It is immediately usable by web application penetration testers and security researchers.

Released under the dual New BSD and Creative Commons by Attribution licenses, FuzzDB can be leveraged to improve the test cases built into open source and commercial testing software.


How was the data collected?

Lots of hours of research while performing penetration tests:

  • analysis of default app installs
  • analysis of system and application documentation
  • analysis of error messages
  • researching old web exploits for repeatable attack strings
  • scraping scanner payloads from http logs
  • various books, articles, blog posts, mailing list threads
  • other open source fuzzers and pentest tools


How to Use fuzzdb

FuzzDB is like an open source application security scanner, without the scanner.

The most common use case is with HTTP proxy and fuzzing tools such as

Other ways fuzzdb is often used:

  • to test web services
  • as malicious input payloads for testing non-HTTP network aware application with custom fuzzing tools
  • as malicious input payloads for testing GUI or command line software with standard test automation tools
  • incorporating the patterns into Open Source software, or into your own commercial product
  • in training materials and documentation
  • to learn about software exploitation techniques


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